GOAWAY vs logging

[reschke]

6.8:

"Endpoints MAY append opaque data to the payload of any GOAWAY frame. Additional debug data is intended for diagnostic purposes only and carries no semantic value. Debug data MUST NOT be persistently stored, since it could contain sensitive information."

Read literally this means it can't be logged; do we really mean that? Do we expect this advice will be followed? Maybe this needs to be made clearer.

[martinthomson]

Clearer in what way? The problem here is that the information potentially contains sensitive data (PII, etc...) Is there something we can do with respect to 2119 language (i.e., not using MUST/NOT) that would make this clearer?